Impact of E-Cigarette Minimum Legal Sale Age Laws on Current Cigarette Smoking
Menée aux Etats-Unis à partir des données de plusieurs vagues d'enquêtes nationales réalisées entre 2009 et 2014 auprès d'un échantillon de 85 861 adolescents âgés de 12 à 17 ans, cette étude estime les effets de lois fixant un âge minimum pour acheter des cigarettes électroniques sur le tabagisme des jeunes
Purpose : The purpose of this study was to use individual-level data to examine the relationship between e-cigarette minimum legal sale age (MLSA) laws and cigarette smoking among U.S. adolescents, adjusting for e-cigarette use. Methods : In 2016 and 2017, we regressed (logistic) current (past 30-day) cigarette smoking (from 2009–2014 National Youth Tobacco Surveys [NYTS]) on lagged (laws enacted each year counted for the following year) and unlagged (laws enacted January–June counted for that year) state e-cigarette MLSA laws prohibiting sales to youth aged <18 or <19 years (depending on the state). Models were adjusted for year and individual- (e-cigarette and other tobacco use, sex, race/ethnicity, and age) and state-level (smoke-free laws, cigarette taxes, medical marijuana legalization, income, and unemployment) covariates. Results : Cigarette smoking was not significantly associated with lagged MLSA laws after adjusting for year (odds ratio [OR] = .87, 95% confidence interval [CI]: .73–1.03; p = .10) and covariates (OR = .85, .69–1.03; p = .10). Unlagged laws were significantly and negatively associated with cigarette smoking (OR = .84, .71–.98, p = .02), but not after adjusting for covariates (OR = .84, .70–1.01, p = .07). E-cigarette and other tobacco use, sex, race/ethnicity, age, and smoke-free laws were associated with cigarette smoking (p < .05). Results unadjusted for e-cigarette use and other tobacco use yielded a significant negative association between e-cigarette MLSA laws and cigarette smoking (lagged: OR = .78, .64–.93, p = .01; unlagged: OR = .80, .68–.95, p = .01). Conclusions : After adjusting for covariates, state e-cigarette MLSA laws did not affect youth cigarette smoking. Unadjusted for e-cigarette and other tobacco use, these laws were associated with lower cigarette smoking.